Here's what rhymes with heftiest.
Words that almost rhyme with heftiest
zestiest testiest heaviest veriest pettiest sexiest airiest emptiest hairiest edgiest sweatiest variant wealthiest deadliest scariest lengthiest sketchiest cheviot wariest fleshiest smelliest stealthiest fleshliest peppiest tetchiest leggiest teariest chariot friendliest recreant lariat homeliest cerement cleanliest dressiest peskiest stretchiest preppiest invariant prescient comeliest unfriendliest uncleanliest commissariat secretariat proletariat